This dataset contains CTD profiles and water samples collected during the Subtropical Shelf Front Cruise (PD_2013_04) on board the research Vessel Puerto Deseado from 3 to 10 October 2013. 

A SeaBird Electronics model 911plus CTD fitted with double sensors for conductivity, temperature and dissolved oxygen (SBE43), one fluorescence sensor (SeaPoint) and altimeter (Benthos  PSA-916) was used throughout the cruise, except for stations number 52 to 55, where a JFE Advantech model ASTD102 (Rinko-Profiler) was used. The Rinko profiler was equipped with pressure, temperature, conductivity, dissolved oxygen, fluorescence an turbidity sensors.

The data are reported in ascii text files. The files consist of a header followed by data converted to engineering units. The header contains station position, date and time information.

Data from individual stations are presented in separate ASCII character files consisting of 1 dbar data records in physical units. Each file is named after the CTD station number corresponding to this cruise. The variables are presented in the following order, with missing values indicated by "-9.990e-29":

Stations number 1 to 51

Latitude [deg]
Longitude [deg]
Pressure [dbar]
Primary Temperature [ITS-90, deg C]
Primary Conductivity [S/m]
Secondary Temperature [ITS-90, deg C]
Secondary Conductivity [S/m]
Fluorescence 
Altimeter [m]
Primary Salinity, Practical [PSU]
Secondary Salinity, Practical [PSU]
Primary sigma-theta [kg/m^3]
Secondary sigma-theta [kg/m^3]
Primary Potential Temperature [ITS-90, deg C]
Secondary Potential Temperature [ITS-90, deg C]
Primary Oxygen concentration [ml/l]
Secondary Oxygen concentration [ml/l]
Depth salt water [m]

Stations number 52 a 55 

Pressure [dbar]
Temperature [ITS-90, deg C]
Conductivity [S/m]
Fluorescence [ug/l]
Turbidity [FTU]
Salinity, Practical [PSU]
Sigma-theta [kg/m^3]
Potential Temperature [ITS-90, deg C]
Oxygen concentration [ml/l]
Depth salt water [m]

Water samples were collected for the determination of salinity, dissolved oxygen, nutrients and chlorophyll. The water samples were collected  with a General Oceanics 1015-12, 5 liter Niskin bottles. Surface water samples for chlorophyll, salinity and nutrients were collected at predeterminated stations. 

The water samples are reported in excel file format (*.xlsx). The first 22 columns contain the CTD parameters followed by the collected water samples data. The CTD values are averages taken while the winch is stopped and the bottle is tripped. The missing values are indicated by "-9.990e-29".  The last column contains observations and quality controls.

Data were calibrated and quality controlled at the Servicio de Hidrografía Naval, Argentina (mcharo@hidro.gov.ar). 
